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8. f( 1 ) = 1 and f( x + y ) = f( x ) + f( y ) + 3xy + 3. Then find f( 5 ) + f( 7 ).
a. 125
b. 135
c. 144
d. 155
Read Solution (Total 2)
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- f(5)+f(7)=47+88=135
ans.b - 9 years agoHelpfull: Yes(5) No(1)
- f(1)=1 (given)
f(1+1)=f(2)=8
f(2+2)=f(4)=31
f(4+1)=f(5)=47
f(5+2)=f(7)=88
Hence, f(5)+f(7)=135. - 8 years agoHelpfull: Yes(1) No(0)
TCS Other Question
7. A, B, C, D are vertices of a quadrilateral and P is a point inside it, if PA=2, PB=5, PC=6, PD=3 then the maximum possible are of quadrilateral formed by A, B, C, D is?
a. 128
b. 64
c. 32
d. 16
9. A, B and C earn 19266 as a whole, 45 times the share of A is equal to 4 times the shares of B and C together, 12 times the share of C is equal to 7 times the shares of A and B together. What is C’s share?
a. 6087
b. 7098
c. 8079
d. 9066