exam
Maths Puzzle
Numerical Ability
b+4b=-90
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exam Other Question
2a^2-3{[b(a^2-b)-a(b+2a)]-[ab(a-b)+b(b-2a)]}
This has me so confused. Can somone help me.
The combined resistance of two resistors R1 and R2 in a parallel circuit is given by the formula R=1/(1/R1+1/R2)
Simplify the formula.