( r 3 −2 r 2 +1 ) ( r−2 ) −1 MathType@MTEF@5@5@+= feaagGart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqk0Jf9crFfpeea0xh9v8qiW7rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeaacaGaaiaabeqaamaabaabaaGcbaWaaeWaaeaaca WGYbWaaWbaaSqabeaacaaIZaaaaOGaeyOeI0IaaGOmaiaadkhadaah aaWcbeqaaiaaikdaaaGccqGHRaWkcaaIXaaacaGLOaGaayzkaaWaae WaaeaacaWGYbGaeyOeI0IaaGOmaaGaayjkaiaawMcaamaaCaaaleqa baGaeyOeI0IaaGymaaaaaaa@46A6@
r 2 + 1 r−2 MathType@MTEF@5@5@+= feaagGart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqk0Jf9crFfpeea0xh9v8qiW7rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeaacaGaaiaabeqaamaabaabaaGcbaGaamOCamaaCa aaleqabaGaaGOmaaaakiabgkHiTiaaikdacaWGYbGaey4kaSYaaSaa aeaacaaIXaaabaGaamOCaiabgkHiTiaaikdaaaaaaa@40DB@
r 2 − 1 r−2 MathType@MTEF@5@5@+= feaagGart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqk0Jf9crFfpeea0xh9v8qiW7rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeaacaGaaiaabeqaamaabaabaaGcbaGaamOCamaaCa aaleqabaGaaGOmaaaakiabgUcaRiaaikdacaWGYbGaeyOeI0YaaSaa aeaacaaIXaaabaGaamOCaiabgkHiTiaaikdaaaaaaa@40DB@
r 2 +2r+ 1 r−2 MathType@MTEF@5@5@+= feaagGart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqk0Jf9crFfpeea0xh9v8qiW7rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeaacaGaaiaabeqaamaabaabaaGcbaGaamOCamaaCa aaleqabaGaaGOmaaaakiabgUcaRiaaikdacaWGYbGaey4kaSYaaSaa aeaacaaIXaaabaGaamOCaiabgkHiTiaaikdaaaaaaa@40D0@