1.

The function `f`satisfies the functional equation `3f(x)+2f((x+59)/(x1))=10 x+30`for all real `x!=1.`The value of `f(7)i s`8 (b)4 (c) `-8`(d) 11A. 8B. 4C. -8D. 11

Answer» Correct Answer - B
`3f(x)+2f((x+59)/(x-1))=10x+30`
For `x=7, 3f(7)+2f(11)=70+30=100.`
For `x=11, 3f(11)+2f(7)=140.`
`(f(7))/(-20)=(f(11))/(-220)=(-1)/(9-4) or f(7)=4`


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