if y^2+1/y^2=18 find the value of y^4+1/y^4
Answers
Answered by
2
Answer:
322 is the answer___tell if its true
Answered by
1
Answer:
y^2+1/y^2=18
=>(y^2+1/y^2)^2=18^2{squaring both the sides}
=>y^4+1/y^4+2×y^2×1/y^2=324
=>y^4+1/y^4=324-2=322
Similar questions