book Maths Puzzle Numerical Ability

8(z+7)-6 = z+60-10
@a+11 = 8a-7
2+2=

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book Other Question

Let x1<...< xm . For I = 1,�,m, define linear operators
Ti : Pn --> R1
By Tip = p(xi). If m<=n, show that (T1,...Tm) is linearly independent. What happens if m>n? Explain Find the product: (2 square root of 7 + 5 squre root of 3)(4 square root of 6 - 5 square root of 5)