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CBSE Class 10 Answered

If alpha beta are the zeros of 3 X square + 5 x minus 7 now find the the value of one upon alpha plus one upon beta
Asked by p.latamishra00 | 25 May, 2020, 12:39: PM
answered-by-expert Expert Answer
Given: alpha and beta are the zeroes of the polynomial P(x) = 3x2 + 5x - 7
U sin g space t h e space r e l a t i o n space b e t w e e n space t h e space z e r o e s space a n d space c o e f f i c i e n t s space o f space p o l y n o m i a l s comma space w e space h a v e alpha plus beta equals negative 5 over 3 space a n d space alpha beta equals negative 7 over 3 C o n s i d e r comma 1 over alpha plus 1 over beta equals fraction numerator alpha plus beta over denominator alpha beta end fraction equals fraction numerator negative begin display style 5 over 3 end style over denominator negative begin display style 7 over 3 end style end fraction equals 5 over 7 H e n c e comma space 1 over alpha plus 1 over beta equals 5 over 7
Answered by Renu Varma | 25 May, 2020, 06:40: PM

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