Question

1 2 1 m-1 4 5 если m=4

Answer 1

121m-145=121*4-145=484-145=339

Answer 2

To evaluate the given expression when m=4, you simply replace the variable m with its value (m=4) and then perform the calculations. Let's do that step by step:

Given expression: 1 2 1 m-1 4 5

Replace m with 4: 1 2 1 (4-1) 4 5

Now, perform the calculation inside the parentheses: 1 2 1 (3) 4 5

Perform the addition inside the parentheses: 1 2 1 3 4 5

Finally, perform the remaining additions: 1 + 2 + 1 + 3 + 4 + 5 = 16

So, the value of the expression when m=4 is 16.